1.x^4+4x^2+4-4x^2=(x^2+2)^2-(2x)^2
=(x^2+2x+2)(x^2-2x+2)
2.(x^4)^2+2x^4+1-x^4=(x^4+1)^2-(x^2)^2
=(x^4+x^2+1)(x^4-x^2+1)
3.(x^2+y^2)^2-25x^2y^2=(x^2+5xy+y^2)(x^2-5xy+y^2)
4.(x^2+y^2)^2-x^2y^2=(x^2+xy+y^2)(x^2-xy+y^2)
5.(m2+7m)^2+4(m2+7m)-5=(m2+7m+5)(m2+7m-1)
6.(2x2-3x+1)2-11(2x2-3x+1)+10
=(2x2-3x+1-1)(2x2-3x+1-10)
=x(2x-3)(2x+3)(x-3)
7.(a^2-5a+4)(a^2-5a+6)+1
=(a^2-5a)^2+10(a^2-5a)+25
=(a^2-5a+5)^2
8.太多了,累了
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024